Leigh Halfpenny's new contract with Top 14 side Toulon could already be under threat because president Mourad Boudjellal thinks that the Wales full-back may have arrived in France with an undisclosed injury.

Halfpenny, 25, underwent surgery on a dislocated right shoulder sustained against England during the Six Nations in March before signing for Toulon this summer.

However Halfpenny is yet to start for his new team, and Boudjellal believes this could be as a result of a previously undisclosed groin injury.

"We need to sort this problem out because we need an international standard kicker," Boudjellal told Varmatin.

"We're awaiting the medical update... But the problem is that we now think that he might have arrived in Toulon with this groin injury. We have the impression that yes, he was injured when he signed for Toulon.

"If that's the case, we have not ruled out breaking his contract."

The news may alert former club Cardiff Blues, who could move for Halfpenny on a dual contract partly funded by the Welsh Rugby Union.